✅ HTTPClient's GetAsync errors and doesn't get caught

private async Task<CheckResult> TestHTTP()
{
    ...
    // above code creates httpclient as client
    try
    {
(!)     response = await client.GetAsync(expectedURL);
    }
    catch (TaskCanceledException ex) when (ex.InnerException is TimeoutException)
    {
        client.Dispose();
        handler.Dispose();
        return CheckResult.TimedOut;
    }
    catch
    {
        client.Dispose();
        handler.Dispose();
        return CheckResult.TimedOut;
    }
    ...
}